gfx/2d/ExtendInputEffectD2D1.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZILLA_GFX_EXTENDINPUTEFFECTD2D1_H_
   8 #define MOZILLA_GFX_EXTENDINPUTEFFECTD2D1_H_
   9
  10 #include <d2d1_1.h>
  11 #include <d2d1effectauthor.h>
  12 #include <d2d1effecthelpers.h>
  13
  14 #include "2D.h"
  15 #include "mozilla/Attributes.h"
  16
  17 // {97143DC6-CBC4-4DD4-A8BA-13342B0BA46D}
  18 DEFINE_GUID(CLSID_ExtendInputEffect, 0x5fb55c7c, 0xd795, 0x4ba3, 0xa9, 0x5c,
  19             0x22, 0x82, 0x5d, 0x0c, 0x4d, 0xf7);
  20
  21 namespace mozilla {
  22 namespace gfx {
  23
  24 enum { EXTENDINPUT_PROP_OUTPUT_RECT = 0 };
  25
  26 // An effect type that passes through its input unchanged but sets the effect's
  27 // output rect to a specified rect. Unlike the built-in Crop effect, the
  28 // ExtendInput effect can extend the input rect, and not just make it smaller.
  29 // The added margins are filled with transparent black.
  30 // Some effects have different output depending on their input effect's output
  31 // rect, for example the Border effect (which repeats the edges of its input
  32 // effect's output rect) or the component transfer and color matrix effects
  33 // (which can transform transparent pixels into non-transparent ones, but only
  34 // inside their input effect's output rect).
  35 class ExtendInputEffectD2D1 final : public ID2D1EffectImpl,
  36                                     public ID2D1DrawTransform {
  37  public:
  38   // ID2D1EffectImpl
  39   IFACEMETHODIMP Initialize(ID2D1EffectContext* pContextInternal,
  40                             ID2D1TransformGraph* pTransformGraph);
  41   IFACEMETHODIMP PrepareForRender(D2D1_CHANGE_TYPE changeType);
  42   IFACEMETHODIMP SetGraph(ID2D1TransformGraph* pGraph);
  43
  44   // IUnknown
  45   IFACEMETHODIMP_(ULONG) AddRef();
  46   IFACEMETHODIMP_(ULONG) Release();
  47   IFACEMETHODIMP QueryInterface(REFIID riid, void** ppOutput);
  48
  49   // ID2D1Transform
  50   IFACEMETHODIMP MapInputRectsToOutputRect(
  51       const D2D1_RECT_L* pInputRects, const D2D1_RECT_L* pInputOpaqueSubRects,
  52       UINT32 inputRectCount, D2D1_RECT_L* pOutputRect,
  53       D2D1_RECT_L* pOutputOpaqueSubRect);
  54   IFACEMETHODIMP MapOutputRectToInputRects(const D2D1_RECT_L* pOutputRect,
  55                                            D2D1_RECT_L* pInputRects,
  56                                            UINT32 inputRectCount) const;
  57   IFACEMETHODIMP MapInvalidRect(UINT32 inputIndex, D2D1_RECT_L invalidInputRect,
  58                                 D2D1_RECT_L* pInvalidOutputRect) const;
  59
  60   // ID2D1TransformNode
  61   IFACEMETHODIMP_(UINT32) GetInputCount() const { return 1; }
  62
  63   // ID2D1DrawTransform
  64   IFACEMETHODIMP SetDrawInfo(ID2D1DrawInfo* pDrawInfo) { return S_OK; }
  65
  66   static HRESULT Register(ID2D1Factory1* aFactory);
  67   static void Unregister(ID2D1Factory1* aFactory);
  68   static HRESULT __stdcall CreateEffect(IUnknown** aEffectImpl);
  69
  70   HRESULT SetOutputRect(D2D1_VECTOR_4F aOutputRect) {
  71     mOutputRect = aOutputRect;
  72     return S_OK;
  73   }
  74   D2D1_VECTOR_4F GetOutputRect() const { return mOutputRect; }
  75
  76  private:
  77   ExtendInputEffectD2D1();
  78
  79   uint32_t mRefCount;
  80   D2D1_VECTOR_4F mOutputRect;
  81 };
  82
  83 }  // namespace gfx
  84 }  // namespace mozilla
  85 #undef SIMPLE_PROP
  86
  87 #endif